This statement is contrary to known facts.
Narragansett - maximum live weight hens -18 lbs. toms - 33 lbs.
Royal Palm - maximum live weight hens -12 lbs. toms - 22 lbs.
If your Narragansett are smaller than your Royal Palms, you do not have normal Narragansetts.
They are both the same breed - Turkey.
If you feed them the same they should taste the same.
The best advice about keeping turkeys with chickens is - don't do it. You will not have a lot of meat on heritage turkey carcasses if you don't keep them at least 9 months to a year. They need a high...